<h1>Electronic appeal filing under Form 99 requires timely submission, tax compliance, verified grounds, and prescribed supporting disclosures.</h1> Form 99 is the prescribed electronic appeal form for filing an appeal before the Joint Commissioner of Income-tax (Appeals) or the Commissioner of Income-tax (Appeals) against an appealable order under the Income-tax Act, 2025. The appeal is optional and must be filed within 30 days from the relevant date. The form requires disclosure of appellant details, order particulars, disputed amounts, pending appeals, grounds of appeal, additional evidence, delay condonation, appeal fees, and supporting documents. Filing is subject to statutory tax-payment conditions, must be electronically filed where return e-filing is mandatory, cannot be revised after verification, and must be verified by the appellant or an authorised person.