Mom wants to pay $10K toward our mortgage. She has been advised to dump some money or pay taxes. Our problem is that we have a small business which has incurred about 70K of credit card debt. We are current on everything but have gotten the shaft from the credit card companies and they have raised our rates double and on some triple. My husband wants to put the "extra" money toward the credit card debt with the highest interest (22%) but don't know how much the mortgage payment will drop with 10K toward principal. We owe $136K on home with 6.375% rate. Please help.

A question for you: Are you trying to pay off your mortgage early or are you trying to get a lower payment?

The best thing to do would be to take care of that credit card debt which is costing you. Whatever extra money you have needs to go towards your debt.
However, if you want to pay off your mortgage early, you can do this by paying your mortgage bi-weekly. For example, if your mortgage is $1400 a month, pay $700 every two weeks. In doing this, more of your money goes towards the principle balance and will knock out at least 10 years off of your mortgage term.

I'm going to have to agree with Cask, paying off the Credit Card debt is probably your number 1 priority due to how bad the CC companies are screwing the public by jacking up the interest rates on people and then hitting them with all these fees and charges.

As for your mortgage, the bi-weekly plan sounds like it might be a help to you. I am not much of an expert in mortgages, but my company does do Loan Modifications and we, on average, are able to get people into fixed rate mortgages around 3.5%

which would be a HUGE help to you if you have an ARM (Adjustable Rate Mortgage) right now.. or even if you just want a lower interest rate on your mortgage,