Service tax registration accounting codes added - ST 1 form amended to require service descriptions and payment codes. Amendment by the Service Tax (Fifth Amendment) Rules, 2012 substitutes the table at serial no.7 of Form ST 1 and inserts an Annexure listing descriptions of taxable services with corresponding accounting codes for Tax Collection, Other Receipts (interest), Penalties and Deduct Refunds; registrants must choose the taxable service description from the Annexure and field formations shall use the prescribed accounting codes for consistent classification and remittance.