You can check the status here:
https://www.irs.gov/filing/wheres-my-amended-return
Amended returns usually take about 4 months to process but this year because of the 10 week COVID-19 shutdown, mailed returns and amended returns are delayed because if the backlog so allow about 6 months to process so probably not before October.
Hopefully your original return was fully processed before you amended. You should also have mailed the amended return certified with return receipt or other tracking service for proof of delivery.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
