See the following FAQ.
Apparently the problem only occurs when you select "Walk me through everything" under Wages & Income. You should be able to avoid the problem by clicking "I'll choose what I work on" instead, then go directly to the specific income topics that you need.
Your suggestion was too late. I started another tax return wasted a lot of time as it did the same thing. Therefore, I just skipped the rental income section and used the tab to go on to deductions and finished up and efiled. My mother was paying me rent but she died so luckily I no longer needed the couple lines where the program was stuck on business income. Thanks anyway.