I-140 and H1-B expiring

[pd_2050]

Hello,

My priority date is Apr 2019 and I-140 was approved in July 2019 under EB2, current H1-B is valid till Dec 2019 and 1st 6 year max-out is Sept 2021. I've the following questions - 

1. Since my H1-B is expiring in Dec, will it affect my I-140 as my 180 days are completing in Jan 2020?
2. Will my  employer have to compulsorily revoke I-140 after Dec or can they still keep it active even if I don't get an extension on my current project?
3. If my employer revokes I-140 after Jan 2020, what happens to my priority date? Will I be able to still retain it and file under new employer with same date in future?
4. If I have to return to my home country after Dec, will I have to go through the H1-B lottery selection at any point or am I exempt from it at all times if coming back to the US?

Any insight is much appreciated. Thank you in advance! 

[pontevecchio]

1. No. If and only if the I-140 is revoked before 180 days, you lose the H1 extensions beyond 6 years.

2. They do not have to do anything.

3. You will retain the PD irrespective of whether the I-140 is revoked or not.

4. Based on an approved I-140, you will get H1 extensions beyond the initial total of 6. 

 

[pd_2050]

Thank you so much @pontevecchio for your reply! It was really helpful.

If you don't mind me asking another follow-up question, is PD affected if the status is changed to H4 in the near future after 180 days?