According to Rule 118 of Central Goods and Service Tax Act, 2017 as passed by Lok Sabha :
Every person to whom the provision of clause (c) of sub-section (11) of section 142 applies, shall within a period of ninety days of the appointed day, submit a declaration electronically in FORM GST TRAN-1 furnishing the proportion of supply on which Value Added Tax or service tax has been paid before the appointed day but the supply is made after the appointed day, and the Input Tax Credit admissible thereon.