Cumulative input tax credit adjustment: May return must include cumulative April-May ITC; April IFF filing window extended.
The amendment requires cumulative application of the input tax credit condition for April and May 2021 and mandates that the FORM GSTR-3B for May 2021 be furnished with the cumulative adjustment of input tax credit for those months. It also allows registered persons to furnish April 2021 details using the Invoice Furnishing Facility (IFF) from 1 May 2021 until 28 May 2021.

Cumulative input tax credit adjustment must be reported in May GSTR 3B; April details may be filed via IFF in May.
The amendment requires cumulative application of the condition in rule 36(4) for April and May, 2021, and mandates that FORM GSTR 3B for May, 2021 be furnished with the cumulative adjustment of input tax credit for those months. It further allows a registered person to furnish April, 2021 details using the Invoice Furnishing Facility from 1 to 28 May, 2021.

Extension of filing deadline for FORM GSTR-1: outward supply details for April 2021 may be filed until the 26th day following the period.
The Commissioner, on the Council's recommendation, inserts a proviso extending the time limit for furnishing details of outward supplies in FORM GSTR-1 for registered persons required to furnish returns, postponing the deadline for the tax period April 2021 until the twenty-sixth day of the month succeeding that tax period.

Extension of GSTR-1 filing deadline: outward supplies reporting for monthly return filers moved to a later date.
The time limit for furnishing the details of outward supplies in FORM GSTR-1 for registered persons required to furnish return under the statute, for the tax period April 2021, is extended until a later day in the month succeeding that tax period by amendment to the earlier notification.

Extension of FORM GST ITC 04 filing deadline for job worker declarations now due by end of May.
Extension granted for furnishing the declaration in FORM GST ITC-04 for goods dispatched to or received from a job worker for the period 1 January to 31 March 2021, with filing time extended until 31 May 2021; notification issued by the Commissioner under Sikkim SGST powers and deemed effective from 25 April 2021.

Extension of ITC-04 filing deadline granted, allowing extra time to submit job-worker declarations under GST.
Extension granted for furnishing FORM GST ITC-04 for goods dispatched to or received from a job worker for 1 January to 31 March 2021, with the filing deadline extended to 30 June 2021 and the notification made effective from 25 April 2021; an earlier reading of the extension to 31 May 2021 was substituted.

Return filing extension: Form GSTR-4 submissions permitted to a specified deadline for the relevant financial year.
Insertion of a proviso requires specified persons to furnish returns in FORM GSTR-4 for the financial year ending 31st March, 2021 up to the 31st day of May, 2021, thereby providing a time-limited extension of the return-filing deadline under the Sikkim Goods and Services Tax Rules, 2017; the amendment is issued under section 148 and is deemed effective from the 30th day of April, 2021.

Extension of GSTR-4 filing deadline permits eligible taxpayers to submit annual returns under amended notification.
The notification inserts a proviso requiring persons covered by the principal notification to furnish the return in FORM GSTR-4 for the financial year ending 31st March, 2021, up to the 31st day of May, 2021, and states the amendment is deemed to have come into force on the 30th day of April, 2021.

Late fee waiver for GSTR-3B returns: phased short extensions for different turnover classes to ease compliance.
Amendment inserts a proviso waiving the late fee under section 47 for specified classes of registered persons who fail to furnish FORM GSTR-3B by the due date, with a Table specifying taxpayer classes, tax periods covered, and the period from the due date during which the late fee is waived, and declares the amendment effective from the stated date.

Late fee waiver for delayed GSTR-3B filing: specified turnover classes granted limited additional grace periods for fixed tax months.
The amendment waives the amount of late fee payable for failure to furnish FORM GSTR-3B by the due date for specified tax periods and specified classes of registered persons, with differing additional grace periods tied to aggregate turnover categories and filing liability; the waiver is inserted into Notification No. 76/2018-Central Tax and is declared to have effect from an earlier deemed date.

Interest on delayed GST returns revised: tiered late-filing rates and staged timelines effective from mid April.
The notification inserts four entries prescribing staged interest treatment for delayed GST returns, distinguishing taxpayers by aggregate turnover and by return-filing category, and applying sequences of reduced and higher interest rates for initial grace periods followed by subsequent periods for returns for March and April 2021 and the quarter ending March 2021; the amendment is deemed effective from 18 April 2021.

Interest rate relief: reduced delayed GST interest slabs for specified taxpayers for select tax periods, easing compliance burden.
Amendment provides reduced delayed-payment interest slabs for March and April 2021: taxpayers with aggregate turnover above rupees 5 crores face 9 per cent for the first fifteen days from the due date and 18 per cent thereafter; taxpayers with aggregate turnover up to rupees 5 crores and specified return-filing categories face nil for the first fifteen days, 9 per cent for the next fifteen days, and 18 per cent thereafter. The amendment is deemed effective from 18th April, 2021.

Reduced GST interest rates for delayed returns in March and April 2021 with staged lower rates by turnover and filing category.
The notification amends the Union Territory GST interest provisions for March and April 2021 by inserting staged interest slabs tied to aggregate turnover and return-filing category: taxpayers with turnover above rupees five crores pay nine per cent for the first fifteen days from the due date and eighteen per cent thereafter; taxpayers with turnover up to rupees five crores and specified return-filing categories pay nil for the first fifteen days, nine per cent for the next fifteen days, and eighteen per cent thereafter. The amendment is effective from 18 April 2021.

Interest relief for delayed GST payments reduces interest obligations for specified taxpayers for designated months.
Inserts a table into the principal IGST notification prescribing temporary, staged reductions in interest for late IGST payment for the tax periods of March and April 2021: higher-turnover taxpayers face a reduced rate for the first fifteen days from the due date and the standard rate thereafter; lower-turnover and specified return-filing categories receive nil interest for the first fifteen days, a lower rate for the next fifteen days, and the standard rate thereafter. The amendment is effective retrospectively from 18 April 2021.

Code on Social Security: section 142 comes into force on 3 May 2021 under central government notification.
The Central Government, exercising powers under sub section (3) of section 1 of the Code on Social Security, 2020 read with section 14 of the General Clauses Act, 1897, appoints 3 May 2021 as the date on which section 142 of the Code on Social Security, 2020 shall come into force by notification S.O. 1730(E) dated 30 April 2021.

De-notification of Special Economic Zone: central government rescinds prior notification, restoring land status subject to prior actions.
Central Government rescinds the notification establishing a Special Economic Zone for IT/ITES at the specified Bengaluru site following the developer's proposal, the State Government's no objection, and the Development Commissioner's recommendation; the rescission is effected under the SEZ Rules rescission provision and preserves actions taken or omitted before rescission.

Fixation of tariff values: updated customs valuation for edible oils, brass scrap, areca nut, gold and silver prescribed.
Fixation of tariff values is made by substituting TABLE 1, TABLE 2 and TABLE 3 in Notification No. 36/2001 Customs (N.T.) under sub section (2) of section 14 of the Customs Act, 1962. TABLE 1 prescribes US dollar per metric tonne values for specified edible oils and brass scrap; TABLE 2 prescribes US dollar unit values for specified forms of gold and silver with explanatory exclusions and definitions; TABLE 3 prescribes the US dollar per metric tonne value for areca nuts.

Option to withdraw pending settlement application must be made via Form 34BB and filed electronically with verified intimation.
Rule 44DA requires the exercise of the option to withdraw a pending settlement application to be made in Form No. 34BB, verified by the person authorised to verify the return of income, furnished electronically per procedures, formats and standards specified by the Principal Director-General/Director-General of Income-tax (Systems), and accompanied by an uploaded signed printout; Form No. 34BB also requires affirmation that the original application was not declared invalid nor subject to a specified order by the stated cutoff date and includes a verification clause confirming competence to verify.

Import exemption for oxygen concentrators added to limited exceptions to gift import prohibition for personal use.
Para 2.25 of the Foreign Trade Policy, 2015-2020 prohibits import of goods presented as "gifts" through post, courier or e-commerce except for life saving drugs/medicines and Rakhi; the revised paragraph adds oxygen concentrators for personal use to the exempted categories where customs clearance is sought as gifts, and limits that exemption to a specified period ending 31 July 2021, while retaining allowance for import of gifts with payment of full applicable duties.

Customs duty exemption for specified inflammatory diagnostic marker kits to facilitate importation for public health response.
An amendment to the customs exemption notification adds a new entry exempting customs duty on inflammatory diagnostic marker kits and blood gas reagents, listing tests including IL6, D Dimer, CRP, LDH, Ferritin and Pro Calcitonin, effectuated under the Customs Act in the public interest and corrected by a subsequent corrigendum.