Donu2019t lie. they know more about you than you think they do.Get an extension. give yourself enough time to do it right, triple check your numbers. give your tax pro enough time to ask you questions.compare last year to this year. look for anomalies.when in doubt, ask. asking will never hurt you.think about last year [or whatever year you are working on]. get out your calendar or phone or whatever, and month by month, see if there were life changes. seriously, a client forgot to tell me they had a kid! u2018because he was born in november so we figured he didnu2019t count.u2019put the return down for a day or two and then check it again, with fresh eyes.