Hi Sue,
The correct website to use is www.indianvisaonline.gov.in but as Hils rightly says, it’s worth confirming this on the FCO (Foreign & Commonwealth Office) website which I’m sure will provide a link.
There are now two new e-visa types, either a 30 day e-visa or a 1 year e-visa. You are unable to apply for the 30 day e-visa until one month prior to departure and the application process takes approximately 3 days. The e-visa is valid from your date of entry into India. The cost is $25, or $10 if your date of entry is between April 1st 2020 and 30th June 2020.
If you are planning to travel to India again within a year, the 1 year e-visa may be more suitable for you as it allows multiple entries into India. The cost of a 1 year tourist e-visa is $40 and is valid from the date of issue of the visa. Again, the application process takes approximately 3 working days and you should apply 5-6 weeks prior to departure.
Hope this helps.
Cheers
Mike