Q. My S corporation had a bad year in 2010. Could this affect my deduction for charitable contributions as a joint filer? M.P.R., San Bernardino, Calif.
A. Yes. Generally, deductions for charitable donations are limited to 50% of your “contribution base.” This is your joint adjusted gross income (AGI) computed without any regard to a net carryback loss.
If your AGI is lower than usual in 2010, you might bump up against the 50% limit on charitable contributions if you made large gifts. In addition, other special rules may apply (e.g., charitable gifts of appreciated property are generally limited to 30% of your AGI).Tip: Any excess charitable deduction can be carried forward for up to five years.