Originally Posted by Markieg
Then I tried to ignore the USA address bit and I get an error about no phone number when there are phone numbers in.
Do the phone numbers you have entered look like valid US numbers (i.e. 10 digits in length, 1st & 4th digits are not 1 or 0, etc)? If not, you could try using a dummy US number, such as 847-700-4000, which is the number for UA's headquarters.