To enter a foreign address in the TaxAct®:

1. From within your TaxAct return (Online or Desktop), click on the Federal tab. On smaller devices, click the menu icon in the upper left-hand corner, then select Federal
2. Click Basic Information to expand that category and then click Name and Address
3. Continue until you reach the screen titled Address and Telephone Number
4. On this screen complete the fields as indicated below:
• Street = Street Address
• City = City name
• State = Select Foreign from the drop down list
• Zip Code = Leave this field blank 
  
5. Click Continue. Select your foreign country from the drop down list and enter the foreign Province and Postal Code. 

Per IRS Instructions for Form 1040, page 13:

Foreign Address

If you have a foreign address, enter the city name on the appropriate line. Do not enter any other information on that line, but also complete the spaces below that line. Do not abbreviate the country name. Follow the country's practice for entering the postal code and the name of the province, county, or state.

While the IRS instructions above state to not abbreviate the country name, the IRS provided the following specific instructions to all software developers in September of 2013:

ALL formats should be standardized to be the 2 digit country code provided by ISO.  The 2 digit should be used in both print and EF. 

The TaxAct programs select country codes according to the Foreign Country Code Listing for Modernized e-File (MeF) which is what software developers must follow.