J S Seth Services LLC US tax document checklist Gather these records for the initial scope review. Your engagement may require additional documents. [ ] Prior-year federal and state returns [ ] Income and withholding statements [ ] Estimated tax payment records [ ] Investment sales and acquisition records [ ] Business and rental income records, if relevant [ ] Foreign income, accounts, and investments, if relevant [ ] A list of changes during the year [ ] Questions and notices to discuss Share records only through your private engagement portal.