There are other possible reasons that the refund monitor doesn't change. One possibility is that your deductions and credits have reduced your tax liability to zero. It cannot go any lower, no matter how many more deductions you have, so there is nothing more to refund. You are already getting your maximum refund. No amount of deductions can make it any higher. If this is your situation, Form 1040 line 15 will be zero and line 19 (which is your refund) will be equal to line 18.
Another possibility is that you are subject to AMT (Alternative Minimum Tax), in which case many itemized deductions are disallowed. The disallowed deductions include state and local income taxes, sales tax, real estate tax, personal property tax, certain mortgage interest, and some medical expenses. No matter how much you add to these deductions, your refund doesn't change because the deductions are disregarded. The more of these deductions that you have in the first place, the more likely it is that you are subject to AMT. If there is an amount on line 45 of Schedule 2, that indicates that you are subject to AMT.
See the FAQ at the following link for instructions to view your Form 1040 in TurboTax Online. It will also show Schedule 2 (or any of the other Schedules 1 - 6) if it is included in your tax return.
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