Agree with Bob.
No, Lacerte does not "take care of" any of these for you but it is capable of handling international returns (much better than many of the different tax products out there).
Big Four use GoRs and ProSystems for international returns. Both have all the sophistication you need for complex international returns but neither "takes care of" anything for you - it all depends on you understanding the tax law, deciding on the appropriate tax position to take, and making the right input so that the tax logic built into the programs will prepare the returns correctly for you.
Lacerte is not as comprehensive as either GoRs or ProSystems but is more than sufficient to manage relatively complex and international returns.
Still an AllStar