TYPO MISTAKE

I made a typo mistake when entering advanced child tax credit on my e file. Instead of $1,500 I entered $1,250. Will IRS correct this error automatically? It has already been accepted by IRS so I wanted to find out if this minor error will affect me. 

 

 Also, will that delay the approval of my return? Will they have to write to me before approving and issue my refund?