Another vote for freetaxusa.com. The only complexity for my Federal returns is accounting for both refunds and taxes due to filing state returns in two states

Another vote for freetaxusa.com. The only complexity for my Federal returns is accounting for both refunds and taxes due to filing state returns in two states (as well as some 1099 income), but they handle those exceptions well. For years I kept a Windows VM around just to run whatever the cheapest tax return software was for that particular year.