Any new plan from LIC is just old wine in a new bottle. Even before I write and finish return calculations, I know that returns will be poor. And I will ask you to stay away. LIC Dhan Varsha is no different.
The first page on the brochure says this about LIC Dhan Varsha.
Invest once, enjoy guaranteed maturity with life cover.
This itself tells you a lot about the plan.

If you are planning to buy an investment and insurance combo product and are not sure what you are buying, do read this post. Or if you prefer to read Twitter threads, you can check out this Twitter thread.
For more on LIC Dhan Varsha, suggest you visit the product page on LIC website.
Along with single premium LIC Dhan Varsha, LIC had also launched a regular premium non-participating plan, LIC Dhan Sanchay (Plan 865). You can read the LIC Dhan Varsha review here.
You can choose the Sum Assured as a multiple of the Single Premium.
2 options.
Maturity proceeds of life insurance plans are exempt from tax only if the Sum Assured is at least 10 times single/annual premium. This is not the case in Option 1. Sum Assured is only 1.25 times single premium.
Death Benefit = Sum Assured on Death + Accrued Guaranteed Additions
Sum Assured on Death depends on the variant chosen.
Option 1: 1.25 times Single Premium
Option 2: 10 times Single Premium
The Single premium depends on the
Note that Basic Sum Assured is different from Sum Assured on Death. Basic Sum Assured comes into picture while calculating Guaranteed Additions. We shall look at the calculation of guaranteed additions later in the post.
Maturity amount = Basic Sum Assured + Accrued Guaranteed Additions
You chose the Basic Sum Assured at the time of policy purchase. And this determines your single premium. As mentioned above, Basic Sum Assured is different from Sum Assured on Death. Basic SA is not linked to Option 1 and Option 2. Basic SA is used to calculate the guaranteed additions and hence the maturity amount.
Guaranteed additions get added to your policy at the end of each policy year and are paid out at the time of maturity/demise. Depends on the Basic Sum Assured and the policy term.

I reproduce an example from the product brochure.
Guaranteed Addition for Basic SA of Rs 10 lacs and Policy tenure of 15 years = Rs 75/ Rs 1000 of Sum Assured for Option 1
GA per year = Rs 75 X Rs (10 lacs/1,000) = Rs 75,000
GA for 15 years = Rs 75,000 X 15 = Rs 11.25 lacs
Maturity amount = Basic Sum Assured + Accrued Guaranteed Additions
= Rs 10 lacs + Rs 11.25 lacs = Rs 21.25 lacs
So, you invested Rs 9.26 lacs and got back Rs 21.25 lacs after 15 years, that is an IRR of 5.7% p.a.
And even this amount is taxable.
I reproduce an example from the product brochure.
Guaranteed Addition for Basic SA of Rs 10 lacs and Policy tenure of 15 years = Rs 40/ Rs 1000 of Sum Assured for Option 1
Total GA = Rs 40 X (10 lacs/1,000) X 15 years = Rs 6 lacs
Maturity Amount = Basic SA + Accrued Guaranteed Additions = 10 lacs + 6 lacs = 16 lacs
You invested Rs 8.34 lacs. Get 16 lacs after maturity.
IRR of 4.43%
But this amount is tax-free.
The pre-tax returns are lower than Option 1 because Option 2 offers you a higher life cover. Thus, higher cost incurred for life cover.