Why file early if the irs is going to hold your refund because you have earned income tax credit

[Eclay]

I filed on 1-29nand have still not hit approved status and was told to expect it by March 3rd. What's the hold up on approval. 

[CatinaT1]

Once your return is filed, TurboTax has no control over the processing of your return or the release of your refund.

Here are a couple FAQs to track your refund:
When will I get my federal tax refund?
How do I track my state refund?
Why does Where's My Refund say "approved" but TurboTax still says "accepted"?

Why do some refunds take longer than others?

What if my IRS refund is taking longer than 21 days?