did not get max earned income

Do you mean the Earned Income Tax Credit?  It is calculated two ways: (1) based on earned income, and (2) based on AGI.  You then get the lower of the two.

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Furthermore, it is figured on a "bell curve."  That is, it goes up as your income rises, but only to a certain point, and then starts to come down.  So, if you are near the maximum income for the EITC, your credit amount is likely to be small.  Sss Tables at the end of this publication:

2020 Publication 596 (irs.gov)

I also note that you are asking from TT Business. This not used for personal tax returns, but rather for  S Corp, C Corp, Partnership and Estate/Trust ones.  Do you have self-employment income?  If so, you must claim all of your self-employment expenses.