I have several 1099INT with treasury bonds, corporate bonds and municiple bonds all on the same statement. The three have different federal and state treatments. I also have accrued interest that has to be subtacted from the interest amounts.
TaxCut assumes the accrued interest is proportional to the interest amounts, but that isn't necessarily true. For instance, one account is mainly municiple bonds, but the accrued interest is mainly corporate bond. So it reduces the corporate bond interest less than it should.
TaxCut's method might result in an error of 5% of the interest. It is random and could help or hurt me. I tried to enter a "1099INT" with the accrued interest as negative values to do it accurately, but TaxCut won't take it.
Can I just go with TaxCut's method and figure it is close enough? I don't like that, but I don't see any alternative. It is not big dollars; maybe $50 of tax. I realize the IRS doesn't even get the accrued interest information, but still...