If there are minor children, you must file in the state where the children reside.
If there are no minor children, you likely could file in either state, however, the courthouse in Mesa, AZ would be a lot closer for you to go to than the courthouse in PA.
As you have been living apart 5 years, most likely it would be a simple divorce, over in about 90 days.
Our office, as well as most other family law offices, offers a free consultation. Talk to a lawyer here in Mesa to discuss the options.
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