Can I deduct rent from a RV park while away from home for work?

Yes. If you have to pay lodging expenses while you are away for home as an employee and if you are not being reimbursed by your employer, you can deduct these as job-related expenses. Just remember that for you to include this as a job-related travel expense, a travel expense has to be necessary for your job and typical in your line of work, and it must come with proof like a receipt

Just remember that job-related expenses that you report as an employee are subject to a 2% AGI limitation and you will only get the benefit if you are taking an itemized deduction on your tax return.

To enter your lodging expenses as a job-related travel expense in TurboTax Online or Desktop, please follow these steps:

1. Once you are in your tax return, click on the “Federal Taxes” tab
2. Next click on “Deductions & Credits”
3. Next click on "jump to full list" or “I’ll choose what I work on”
4. Scroll down the screen until to come to the section “Employment Expenses”
5. Choose "show more", then Job-related expenses and follow the onscreen instructions          

• Say "yes" to question "Did you have any of these expenses in 2015 for your W-2 income?" under the screen titled "Employment Expenses Related to a W-2".
• after about 6 to 10 question screens, you will get to a screen titled "Any Other Expenses?" you can put this information here under travel expenses (see screenshot)