H1B extension for 1-year or 3-years

[lastcomic]

My 485 has been filed and accepted, I have a RD.

Now my h1b is going to expire in a couple of months and I need to renew it.
1. Will I get a 3-year extension or 1-year extension of H1B now?

2. I plan to file it myself with the help of the company HR, is it easy enough? Where can I go to get more information about the requirements and documents needed for H1B extension?

 

[GotPR?]

LC filing date ?
I140 approved ?

 

[lastcomic]

LC filing date ? Nov 2003
I140 approved ? Yes, March 2007

 

[GotPR?]

You can get whichever of 1 year or 3 years you want.