Military BAH and BAS allowances - amount entered but tax did not reduce

When I entered my military BAH and BAS allowances under the nontaxable income section within the Sales Tax deduction portion of TT, my tax did not decrease like I thought it had in prior years. I would see the number move.

 

I would expect, that since BAH/BAS is not taxed, the amount of tax owed would decrease. In addition, Schedule 8812 (Child Care) form was created after entering BAH. This has not occurred in the past. I noticed during the error check as I was prompted to enter money received for child care. I've been using TT since 199 an have never seen this form before.

 

Does it have anything to do with income limits, if not any other explanation?