I got multiple 1099-Div from my brokerage for 2021. When entering in Turbo Tax, can I consolidate them and make one entry, or fill multiple line items for each 1099?

1)  The simplest solution may be to import the 1099-DIVs from your brokerage using Turbotax 

See https://ttlc.intuit.com/community/entering-importing/help/where-do-i-enter-my-1099-div-in-turbotax-online/00/27046

2)  I'm not an expert, but I think you can enter summary info.  Be sure to summarize each box correctly and to keep the qualified and non-qualified dividends separate.  If you use multiple brokerages, you should summarize one per brokerage firm.

3)  If it is a small amount, you can enter the data manually.

I hope this helps.

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also make sure that some of those 1099's are not corrected forms of earlier ones.

so far from one brokerage, I've gotten 3 corrected 1099s