When to Deduct. In most cases, taxpayers can deduct expenses in the year paid or incurred. Some costs must be ‘capitalized,’ however. This means deducting the cost over a number of years.
All taxpayers should keep a copy of their tax return. Beginning in 2017, taxpayers using a software product for the first time may need their Adjusted Gross Income (AGI) amount from their prior-year tax return to verify their identity. Taxpayers can learn more about how to verify their identity and electronically sign tax returns at Validating Your Electronically Filed Tax Return.