Thanks for the info. Very helpful. The instructions on my notice from IRS say pay $2900 + interest by December 26. Or call IRS 1-800 number or write to them if I don't agree. Must call or write by Feb 3. I guess I'll try calling and see if I can get through to someone.
The notice shows several changes IRS made to the return. My 1040 line 24 says $33,784, IRS says $35,284, a difference of $1500 which is the amount we received as shown on Letter 6419. My 1040 line 28 shows $1400, IRS shows $0.
