H.R.1911: To amend the Internal Revenue Code of 1986 to modify the credit for expenses for household and dependent care services necessary for gainful employment.

Tax Relief for Working Caregivers Act of 2007 - Amends the Internal Revenue Code to: (1) increase from $15,000 to $75,000 the taxpayer adjusted gross income amount at which the tax credit for household and dependent care expenses is phased down; and (2) allow such credit for a physically or mentally incapacitated parent (or an ancestor of such parent) of the taxpayer who is a dependent of such taxpayer.