I've gone down the Bigger Pockets rabbit-hole that I was lucky enough to stumble across on the podcast App Store on my phone.

If you go to https://apps.irs.gov/app/picklist/list/formsPublications.html you can find these publications:  527, 544 and 550.  

It works very well for multiple rentals by setting each up as a class and assigning that class to every expense using the phone app or online.

With paper apps, you have to print them, hand them out, collect them, and re-input the info, where online apps, you just share the link and tenant applies, and you can get you screening reports directly through that process with no extra work. 

How long should we keep potential applications that are not current or past tenants in California?  I've looked it up and can only find "Until you're no longer liable."  Well yes, I get that, but how long before we're...

sigh - the BP app can be touchy...Continued... their inspector says the trapezoid should be scraped and repainted - just say trapezoid to be removed but not offering to repair - even if it cannot be reasonably removed but give me a big enough sledge hammer and i will show you something removed.

Simpler ones like Cozy, Pendo or mobile app like Landlordy or Housters would be also fine for small portfolio.

I just downloaded the app CamCard yesterday.

They can be canceled by the tenant at any point as well.Money Orders/Cashiers Check: These are considered safer than personal checks because you need to use verified funds to purchase them, however, although it's harder they can still be canceled before you deposit them and they are a burden for the tenant to get and for you to electronically deposit through most bank apps, which means you have to take a trip to the bank.

As an example, HubDoc can pull full bank statements and read/enter the details of uploaded receipts taken from a smartphone's camera through their app or sent to HubDoc using an email hook.