Once a client took the same spreadsheet of deductions from the previous year, changed the dates and submitted it to me again the next year for his business.
Another time a client told me that "eighty percent" of the gross income shown on their Form 1099-MISC was expenses, with ten percent here and twenty percent there, and expected me to compute the actual figures.
These kinds of things are obviously covered by the due diligence requirements of Circular 230. But what about smaller things? Where do we draw the line?
1) Suppose a client has believable figures for their noncash charitable contributions, but they get a bit "fuzzy" on the details. They seem to be making up dates and descriptions.
2) Suppose income and deductions totaling no more than a few hundred dollars need to be allocated between states for a split year return and the client asks if we can just estimate based on the number of months spent in each state.
In both cases, federal tax liability is unaffected. In the case of the state allocation, nothing on the federal return is affected at all. Are these scenarios on the safe side of the line?
AICPA's SSTS No. 4 permits the use of estimates "[u]nless prohibited by statute or by rule", and provides that "a member may prepare a tax return using a taxpayer’s estimates of the missing data".
Circular 230 doesn't say anything about estimates, and doesn't cover state returns either.