I still havent received my refund. IRS said deposit was made on March 4.. It has not appeared on my check

Were you having the Turbo Tax fees deducted from it?

Once Where's My Refund? shows "Refund Sent" and a date, it could take up to 5 days for it to be reflected in your bank account, it all depends on the bank, how and when funds are credited.

March 4 has been a month.