Question on AMT

Question on AMT

Re: Line 54 of 1040 - Other Credits.

Questions:

1. Does a figure on line 54 have any bearing on the AMT calculated, before or after AMT is calculated?
2. Does this figure get subtracted from the AMT due?
3. Or is it disallowed when an AMT amount is due?

For example if my AMT is $5000 and the amount on line 54 is $4000, then is the tax due $1000?

I have a figure on Line 54 of 1040-Other Credits via my K-1s (and these figures on the K-1s came from Form 8846 of a SCorp Tax Return). 

I have only 1 General Business credit so based on what I read on the internet I do not have to file Form 3800.

Please let me know your thoughts.