Where on tax form do I enter taxable employer relocation, temp housing, gift?

If your relocation expenses paid by your employer were not included as taxable income on your W-2, you could report this as 'Other Reportable Income' as you suggested.  However, since moving expenses are no longer deductible (except in certain cases, like military), you can't claim expenses against the income, so be sure that the reimbursement was not in fact, added to your W-2.  You don't have to submit documentation with your tax return, just save it for your records.

Here's more info on Employer Reimburse Moving Expenses.

An Employer Bonus should be reported on a W-2, as well, or a 1099-Misc should be issued.  Again, be sure this is not included in your W-2. 

To report the bonus, you enter the income as additional wages that were not reported on a W-2. You will have to pay the Social Security and Medicare taxes that the employer should have withheld from the bonus. This will be the same amount that would have been withheld if your employer had handled it correctly and included the bonus in your W-2.

To report this correctly in TurboTax:

1. Click on Federal in the left column
2. Scroll down to Less Common Income. Select Show more.
3. Start Miscellaneous Income, 1099-A, 1099-C
4. Start Other income not already reported on a Form W-2 or Form 1099 (even though it was reported on a 1099)
5. Say YES to Did you receive any other wages?
6. Continue to Any Other Earned Income
7. Say Yes to Did you earn any other wages?
8. Check Employee compensation that was not reported on a W-2

Here's more info on Reporting Bonuses. 

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