401k rollover to taxable account by mistake

I initiated a small direct rollover from a 401k to a brokerage.  The account I set up at the brokerage was a taxable account, not a rollover IRA account as intended (my mistake). The direct transfer went to the taxable brokerage account, but I didn't catch it.  I've received a 1099-R and the 401k company says the code G is correct because they didn't withhold taxes.  They won't re-issue the 1099-R.

 

Should I file my taxes as normal, wait until they are accepted, then make an amendment with 1040-X?  If so, should I submit a substitute Form 1099-R (Form 4852) showing the correct taxable amount in box 2a? I'm planning to simply pay the taxes on the rollover. I'm over 59 1/2.

Thanks!