Contributions to BOTH SEP IRA and solo 401K - Does it matter how much into each?

[mgoslak]

I am self employed and I have an SEP IRA and solo 401k.

I told TT to "maximize" both.

It came back w/ $73,500 total amount (I'm over 50 years old).

And it said, $30K is my max. employee deferral to the solo 401k.

If I put $30k into my solo 401k does it matter where the remaining $43,500 goes?

Can it be split between the SEP and solo 401k?

The reason I have 2 accounts is because I had the SEP IRA for years and just this year I created the solo 401k to get a bigger tax deduction.